Hello, I'm Lennier.

I'm currently a senior at Lowell HS in San Francisco, where I'm taking courses in Calculus, Physics, and Cybersecurity.

I enjoy playing the guitar, reading SF/Fantasy novels, mountain biking, running, rock climbing, playing jugger, and programming. I also take photos sometimes, you can see some of them in the gallery!

I'm a member of Hack Club, a nonprofit organization helping teens fall in love with computers and electronics. They've helped me build some pretty cool things, like a 3d map viewer for the terminal and a cheap dual-arm SCARA plotter.

I was a member of #1 Sea Bass (FIRST Robotics Competition team 10221) for the 2026 REBUILT season. As we were a seven-person team, we all wore a lot of hats: I was their business lead and human player, and I also did subsystems programming, autonomous period programming and pathing, a lot of assembly/mechanics work, and even some shopkeeping.

After the dissolution of 10221, I joined CardinalBotics (FRC team 4159), where I am now Shopmaster and Electrical Lieutenant. Good luck to all teams competing in BIOCORE!

I'm Co-President and Head of Operations at Flight Club Aerospace, a student-run nonprofit building an FAA Part-103 compliant ultralight aircraft from scratch, with the goal of publishing a journal of our process to help other high-schoolers do the same. Unfortunately the club has been rather dormant lately, as we've been struggling to find a permanent home for the plane. If you have a workspace we could rent, would be interested in sponsoring us, or would like to support us some other way, please reach out to us! We also take donations.

In addition to all this, I'm also a theater techie! I've designed, programmed, and ran lighting for shows, and I've created and operated onstage practical lighting effects. You should come watch our shows sometime, I promise they're good!

If you'd like to contact me, you can reach me here: lenniermulder[AT]icloud[DOT]com

You can find most of my code on GitHub, here.

I'm also on LinkedIn, you can find me here.

Fellow bookworm? Check out my LibraryThing and Hardcover profiles!